Invalidity dossier
US 10117295
LED lighting apparatus for use with AC-output lighting ballasts
Current assignee: Prosperina Ventures LLC
Added 9/23/2026, 3:17:25 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 10,117,295 B2
Title: LED lighting apparatus for use with AC-output lighting ballasts
Patent number / application: US10117295B2; application US13/749,082; publication US20140203714A1.
Assignee / inventor: Original assignee Cree Inc.; inventors Jun Zhang and James Andrew McBryde. Current assignee listed as Prosperina Ventures LLC (with Cree Lighting USA LLC also listed). (Per instructions, ownership transfers and related history are not analyzed here.)
Key dates: Priority date and filing date 2013-01-24; publication date 2018-10-30; listed adjusted expiration 2035-08-18; status active.
Purpose: The patent relates to solid-state lighting, addressing retrofit/replacement of conventional lamps. The source defines the inventive subject matter as relating generally to lighting apparatus and methods, and more particularly to solid-state lighting apparatus and methods.
Plain-language scope (from the supplied text): The apparatus includes at least one LED and a passive resonant converter circuit whose output couples to the LED and whose input couples to a ballast producing an AC output (e.g., high-frequency electronic ballasts for gas-discharge lamps such as fluorescent tubes, sodium vapor and mercury vapor lamps). The passive resonant converter circuit may combine a passive rectifier circuit (such as a passive diode bridge) and a resonant circuit (such as a CL resonant circuit); the rectifier input couples to the ballast, and the resonant circuit and LED couple to the rectifier output. A capacitor may be coupled in series between ballast and converter for low-frequency current blocking. An isolation transformer may be coupled therebetween. Embodiments include a lamp (housing, contacts, LED, resonant circuit) and a lamp replacement kit, with the resonant circuit optionally having an inductor in series with the LED and a capacitor in parallel with both. A module packaging option is also described.
Classifications include H05B45/00, H05B45/30, H05B45/37, H05B45/3725, H05B45/39.
Source: https://patents.google.com/patent/US10117295/en
What the excerpt does not establish: The full claims, specification text, drawings, prosecution history, and figures (FIGS. 1–14 referenced but not reproduced) are not available in the excerpt. It therefore does not establish exact claim scope, limitations, or the complete disclosure.
Generated 10/1/2026, 9:51:41 PM
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Litigation summary
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Proceedings on file (0)
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No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
Prior art
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Obviousness
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Extensions
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Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.